Fire-door.



F. M. WHYTE.

HRE DOOR.

APPLICATION FILED JUNE I 1914.

- 1,177,668. Patented Apr. 4,1916.

WITNESSES: [MENTOR eak/re, ah

. v ATTORNEY furnaces, of that type in which the door UNITED s ATiis P ENT onnrcn.

FREDERICK M. WHYTE, OE 'IARRYTOWN, YORK, AS$IGNOR T0 HUTCI-IINS- CAR ROOFING-COMPANY, 0F DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

FIRE-DOOR.

Application filed June 1, 1914. Serial No. 842,210.

To all whom it may concern Be it known that I, FREDERICK M; \VHYTE, a citizen of the United States of America,

residing at Tarrytown, in the county of Westchester and State of New York, have invented certain new and useful Improvements in Fire-Doors, of which thefollowing is a specification, reference being had therein to the accompanying drawings. 7

The invention relates to fire doors for opens inwardly and in closed position rests against an annular seat on the door frame. Doors of this type are particularly adapted for use incconnection with a pneumatic or motor-operated opening and closing mechanism, and have the advantage that in open position the door is inside of the door frame and does not obstruct free access to the opening. On'the other hand, a defect of construction as heretofore made is that the door can only be detached by the complete disengagement of the door frame from the boiler or furnace wall. I

It is one of the objects of the present invention to obtain a construction in which the dOOr may be easily removed without detachment of the door frame, and a further object is to obtain a simple and practical construction to manufacture.

In the drawings: Figure 1 is a front elevation of the door frame and door; Fig. 2 is a vertical central section through the same shown in relation to the furnace wall and door opening; and Fig. 3 is a plan view of one side of the frame.

A is the furnace wall, which, as shown, is of the usual hollow construction forminga water jacket, the inner and outer sheets being flanged at B and B to overlap each other and form the door opening.

0 is the door frame which has an annular flange C secured by bolts or studs D to the furnace wall.

To form a seat for the door, and also to provide for the inward opening of'the latter, the frame C is formed with an outwardlyprojecting portion C terminating in'an outwardly and upwardly inclined wall apertured to form the door opening D. Surrounding this opening ancl on the inner face of the inclined wall is an annular seat E forming a closed-door seat for the door.

F is the door which is hinged at its upper end and adapted when swung inward to lie adjacent to the top of the door opening, as shown at V. The door is hinged by attaching the same to a rock shaft G through the medium of straps H, and the rock shaft is journaled in suitable bearings in the frame Specification of Letters Patent. I Patented Apr/1;, 1916.

and provided with an operating mechanism,

attached preferably between the bearings. As shown, th1s o-peratmg mechanism is vformed by an actuating rock-arm I of the rock shaft G, which is connected by a pitman J with a piston in a cylinder K arranged vertically and mounted upon a bracketL projectinghoutward from one side of the door frame.

The door F to properly seat upon the frame is of greater dimensions than the door opening D. This would prevent its insertion through the door opening, and if the frame were of integral construction it would be necessary to detach said frame from the furnace wall to remove the door.

Inasmuch as it is frequently necessary to remove the door for repairs, such for instance as the renewal of the lining plate W therefor, and also as the door frame is a large and heavy casting, the necessity for detaching the latter is objectionable. With my improved construction, I have avoided with a detachable cap section M. This covers an opening in the top of the frame of sufiicient area for the insertion and removal of the door, and the cap in connection with the frame may form a split bearing or journal for the door trunnions or rock shaft G. Thus, as shown, the cap M is provided with side flanges ,N which are bolted to complementary side flanges O on the-frame C, and'when the shaft G passes through them, the flanges are curved around the shaft at P and may be used for the shaft bearings. Supporting bearings for the-shaft are also provided at Q and R, Q, being a bifurcated bearing member at the upper and outer end of the flange L, and B being another form; and either of thesev can be used at both .this objection by forming the door frame places. The rock arm I is arranged preferably'between the bearings Q and P on one side of the frame, and a hand operated lever use, whenever it 'is necessary to remove the d r the cap M is detached, which permits opening, and flanges projecting outward from the opposite sides of said annular flange, a door seated within said frame on the annular bearing surrounding said door opening, a detachable cap for covering an opening in the top of said outwardly-projecting portion, through which the door may be inserted or withdrawn, a rocleshaft on which the door is hung, andbearings for said shaft formed on said flanges, projecting outward from the annular flange of said frame.

2. The combination with a furnace, of a door frame therefor, having an annular flange secured to the furnace wall, an opentopped outwardly-projecting portion having an inclined wall formed with a door opening and with an annular door seat in'closing said opening and having a flange projecting outwardly from said annular flange at each side of said outwardly-projecting portion, formed with a bearing, a door mounted within said outwardly-projecting portion of the frame normally restlng upon said annular seat, a

detachable cap for covering the top of said outwardly-projecting portion, forming with Copies of this patent may be obtained for said portion a hearing at. each side of the door opening, and a rock-shaft on which" the door ishung, journaled in the'last named bearings and in the bearings formed in said outwardly-projecting flanges. V

3. The combination with a furnace, of a door frame therefor, having anoutwardl'yprojecting open-topped portion formed with a door opening and having an integral strip separating the top opening from the door 4, The combination with a furnace, 'ofa door frame therefor having an outwardly projecting open-topped portion formed with a door opening and having an integral strip 3 separating the top opening from thedoor opening, a door seated upon the inner'face of said frame, pivotal members for the door engaging the frame at'each side ofthe door opening, a cap closing the top opening ha'v ing portions engaging said pivotal members,

and a common'means for securing said cap to the frame and maintaining the oapieir gaged with said pivotal me1nbers.- V

In testimony whereof I aflix my signature in presence of two witnesses.

Witnesses: 1 POWERS,

CHARLES R. BRADY. V

five cents each, by addressing the Commissioner of-Patents, Washington, I). 6:. i

FREDERICK M. WHYTE] 

